Question

Please help!
What value of j makes the sequence:
1, j, 23, .... arithmetic?

Answer 1

12

Answer 2

1+11=12, 12+11=23, etc.

Answer 3

1+11=12
12+11=23

Answer 4

\[d=23-j=j-1\]

Answer 5

d = 11.
a1 = 1
a2 = a1 + d = 1 + 11 = 12
a3 = a2 + d = 12 + 11 = 23

So, j = 12.

Answer 6

a simple formula for that called arthematic mean =a+b/2=1+23/2=24/2=12:)

Answer 7

thanks y'all! :)